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我一直试图弄清楚如何在ptpython控制台中保存和读取我的 Python 命令的历史记录，但一直没能做到。到目前为止，我所有的努力都是这个答案的变体。但是，我仍然无法阅读我的历史。

我只是希望能够按下↑</kbd> and ↓</kbd> arrows to go through my Python commands from a previous console session (not the current console session that I'm in). Here's what I currently have in my $PYTHONSTARTUP file:

# Add auto-completion and a stored history file of commands to your Python
# interactive interpreter. Requires Python 2.0+, readline. Autocomplete is
# bound to the Esc key by default (you can change it - see readline docs).
#
# Store the file in ~/.pystartup, and set an environment variable to point
# to it:  "export PYTHONSTARTUP=/home/user/.pystartup" in bash.
#
# Note that PYTHONSTARTUP does *not* expand "~", so you have to put in the
# full path to your home directory.

import atexit
import os
import readline
import rlcompleter
import sys
try:
    from ptpython.repl import embed
except ImportError:
    print('ptpython is not available: falling back to standard prompt')
else:
    sys.exit(embed(globals(), locals()))

historyPath = os.path.expanduser("~/.ptpython/history")

def save_history(historyPath=historyPath):
   import readline
   readline.write_history_file(historyPath)

if os.path.exists(historyPath):
   readline.read_history_file(historyPath)

atexit.register(save_history)
readline.parse_and_bind('tab: complete')
del os, atexit, readline, rlcompleter, save_history, historyPath

我的$PYTHONSTARTUP变量是：

$ echo $PYTHONSTARTUP 
/Users/[redacted]/.pystartup

我使用的是 Python 3.7.3、macOS 10.14.6 和 ptpython 2.0.4。

谢谢

4

1 回答 1

4

如果您检查嵌入的源代码，那么您会看到选项history_filename=

embed(globals(), locals(), history_filename=historyPath)

import os

try:
    from ptpython.repl import embed
except ImportError:
    print('ptpython is not available: falling back to standard prompt')
else:
    historyPath = os.path.expanduser("~/.ptpython/history")
    embed(globals(), locals(), history_filename=historyPath)

顺便说一句：如果文件夹~/.ptpython不存在，那么您必须在运行代码之前创建它。

于 2020-01-27T18:38:48.680 回答